101 lines
3.2 KiB
TypeScript
101 lines
3.2 KiB
TypeScript
/** @jest-environment node */
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import path from 'path'
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import { promises as fs } from 'fs'
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import sharp from 'sharp'
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import {
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buildWhiteBackgroundWebpVariants,
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resolveWhiteBackgroundPreviewFileUrl,
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WHITE_BACKGROUND_PREVIEW_MAX_DIMENSION,
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} from '@/lib/white-background-preview'
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describe('white-background-preview helpers', () => {
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const tempRoot = path.join(process.cwd(), 'uploads', '__white-background-preview-tests__')
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const originalEnv = { ...process.env }
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beforeEach(() => {
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process.env.S3_PUBLIC_DOMAIN = 'https://s3.jiansun.vip/gongxiangpan'
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})
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afterEach(async () => {
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process.env = { ...originalEnv }
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await fs.rm(tempRoot, { recursive: true, force: true })
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})
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test('builds original and preview webp variants for large transparent images', async () => {
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const source = await sharp({
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create: {
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width: 2200,
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height: 1100,
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channels: 4,
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background: { r: 255, g: 255, b: 255, alpha: 0 },
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},
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})
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.png()
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.toBuffer()
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const { original, preview } = await buildWhiteBackgroundWebpVariants(source)
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const originalMetadata = await sharp(original).metadata()
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const previewMetadata = await sharp(preview).metadata()
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expect(originalMetadata.format).toBe('webp')
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expect(originalMetadata.width).toBe(2200)
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expect(originalMetadata.height).toBe(1100)
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expect(previewMetadata.format).toBe('webp')
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expect(previewMetadata.width).toBe(WHITE_BACKGROUND_PREVIEW_MAX_DIMENSION)
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expect(previewMetadata.height).toBe(750)
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expect(original.length).toBeGreaterThan(preview.length)
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})
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test('preview variant does not enlarge small images', async () => {
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const source = await sharp({
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create: {
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width: 400,
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height: 300,
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channels: 4,
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background: { r: 255, g: 255, b: 255, alpha: 0 },
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},
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})
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.png()
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.toBuffer()
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const { preview } = await buildWhiteBackgroundWebpVariants(source)
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const previewMetadata = await sharp(preview).metadata()
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expect(previewMetadata.width).toBe(400)
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expect(previewMetadata.height).toBe(300)
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})
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test('优先使用本地 preview 文件，否则回退到 public-display 链接', async () => {
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const originalAbsolutePath = path.join(
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tempRoot,
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'material-1',
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'white-background',
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'sku-1',
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'front.webp',
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)
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const previewAbsolutePath = path.join(
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tempRoot,
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'material-1',
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'white-background',
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'sku-1',
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'preview',
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'front.webp',
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)
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const originalRelativePath = path.relative(process.cwd(), originalAbsolutePath).replace(/\\/g, '/')
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const previewRelativePath = path.relative(process.cwd(), previewAbsolutePath).replace(/\\/g, '/')
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await fs.mkdir(path.dirname(originalAbsolutePath), { recursive: true })
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await fs.writeFile(originalAbsolutePath, Buffer.from('original'))
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expect(resolveWhiteBackgroundPreviewFileUrl(originalRelativePath)).toBe(
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'https://s3.jiansun.vip/gongxiangpan/public-display/white-background/material-1/sku-1/front.webp',
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)
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await fs.mkdir(path.dirname(previewAbsolutePath), { recursive: true })
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await fs.writeFile(previewAbsolutePath, Buffer.from('preview'))
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expect(resolveWhiteBackgroundPreviewFileUrl(originalRelativePath)).toBe(`/${previewRelativePath}`)
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})
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})
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